CN104345391B - The All-optical routing device of modular extendable - Google Patents
The All-optical routing device of modular extendable Download PDFInfo
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- CN104345391B CN104345391B CN201410550995.9A CN201410550995A CN104345391B CN 104345391 B CN104345391 B CN 104345391B CN 201410550995 A CN201410550995 A CN 201410550995A CN 104345391 B CN104345391 B CN 104345391B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
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Abstract
The invention discloses a kind of All-optical routing devices of modular extendable.N roots single mode input fiber is connected with the input port of the first spatial light router, is output to first group of wavelength convert and routing module, is connected after wavelength convert and routing module, then through second space optical router with second group of wavelength convert and routing module.Optical signal passes through wavelength convert and routing, into N root single-mode output optical fiber, completes routing of the optical signal to corresponding single-mode output optical fiber；Wherein the first spatial light router and the work of second space optical router mirror image.The present invention completes wavelength convert in division multiplex fibre-optic communication wave system, each optical signal being made to route to the arbitrary channel of arbitrary output port from input port；And the cascade to wavelength convert and routing module and linearly increasing, the more complete routing function of realization, increase routed channels number can be passed through.Entire routing infrastructure can be realized integrated by Planar Lightwave Circuit Technology.
Description
Technical field
The present invention relates to fiber optic communication All-optical routing technology, more particularly, to a kind of All-optical routing of modular extendable
Device.
Background technology
After optical fiber is born and is applied successfully, Fibre Optical Communication Technology is grown rapidly, and the invention of WDM communication modes causes light
Fiber communication bandwidth greatly improves.Rapidly increasing for fiber optic communication data directly proposes each processing node in optical communication network
Requirements at the higher level, all-optical communication network become the developing direction of following optical communication network.
Optical signal bag forwarding using wavelength as foundation is the important way that signal is route in WDM optical-fiber networks.Current
Mainstream technology mostly using the processing mode of optical-electrical-optical wavelength convert and routing, it the advantages of be it is technically more ripe, it can be achieved that
Periodically, regeneration, shaping feature, but this scheme are due to introducing light-to-current inversion and Clock Extraction, it is necessary to many high cost, Gao Gong
The high speed optoelectronic instrument of consumption, opaque to signal bit rate and signal format, there is " electronic bottleneck " in conversion speed,
The demand for development of all-optical network " high data throughput, high RST process bandwidth, low energy consumption " is not met.It is also a kind of to be based on micro- electricity
The routing infrastructure of sub- electromechanical system switch (MEMS-Switches) has had the commercial device for supporting that 32 input/output end ports exchange
Part report " Glimmerglass Intelligent Optical System, " tables of data can bewww.glimmerglass.comIt obtains.But the greatest drawback of this structure is that channel switch time is long, up to millisecond magnitude, only
Suitable for Continued communication time span between a pair of of node in the situation of second-time.
All-optical routing needs not move through electrical domain processing, directly by information from a light wavelength conversion to another optical wavelength,
By the forwarding of optical passive component, reach routing purpose.Mainly there are Optical Demultiplexing, wavelength convert, light in wdm system optical router
The modules such as multiplexing, optical routing." electronic bottleneck " problem is not present in All-optical routing, and bandwidth is huge, transparent to signal rate and form,
And single chip integrated All-optical routing chip energy consumption will more route than optical-electrical-optical and substantially reduce.
The All-optical routing device proposed at present is mainly had photoswitch, passive array waveguide grating device and is put based on semiconductor light
Big two kinds of device (SOA) wavelength convert.“Multi-path Routing in an Monolithically Integrated 4×
4 Broadcast and Select WDM Cross-connection ", ECOC, September18-22,2011, InP
PHOTONICS (Mo.2.LeSaleve) reports a kind of all-optical cross interconnection based on SOA photoswitches, and which realizes 4 ×
4 optical signal cross-connects.This All-optical routing mode is mainly made of broadcast selecting module and 2 part of wavelength selecting module.
It broadcasts in selecting module, the optical signal of 4 input ports is separately input to each by cascading multi-mode interference coupler (MMI)
The input port of array waveguide grating (AWG).Before AWG is entered, per there is SOA switches on the way, by adjusting SOA injections
Electric current, to control the break-make per all the way.After the forwarding that 4 cycle 4 × 4 arrayed-waveguide grating routers (AWGR), letter
Number enter wavelength selecting module.It is designed according to routing table, SOA electric currents on each output ports of adjusting wavelength selecting module AWG, it can be with
The wavelength of the latter linked cascade MMI Shang Ge roads signal of decision, and then can reach every on the entire router chip output terminal of control
Wavelength all the way.But the method can only carry out the forwarding of different input port optical signals, and original signal cannot be transferred to separately
On one wavelength, and with input signal channel number (N) increase, it is necessary to accordingly increase to it is N number of cycle N × N AWGR and
2N SOA switch.Meanwhile it will pass through cascade MMI per input signal all the way and extend to N number of output port, entire route system
Single-side pin number is N2It is a, device size can be greatly increased.This chip structure is extremely unfavorable for the extension of channel number, increases
Add signal all the way, the design of entire chip will change, and device design difficulty greatly increases.“An 8x8 InP
Monolithic Tunable Optical Router (MOTOR) Packet Forwarding Chip ", Journal of
Lightwave Technology, Vol.28, Issue 4, pp.641-650 disclose a kind of light path based on SOA wavelength converts
By mode.Intermodulation effect of this mode by the way that original signal to be passed through to SOA is transferred to the new ripple that tunable laser is sent
In length, then with AWGR it is forwarded to respective channels.But this structure transfer capability is limited, is proposed in optical-fiber network level more
Signal exchange between optical fiber.
Above-mentioned All-optical routing structure cannot completely realize the wavelength convert of All-optical routing and transparent turn of port in optical-fiber network
The functional requirement of hair, and the autgmentability of system is not good enough.
The content of the invention
In view of the deficiencies of the prior art, it is an object of the invention to propose a kind of All-optical routing device of modular extendable.
The technical solution adopted by the present invention is：
The present invention includes the first spatial light router, two groups of wavelength converts and routing module and second space optical router；
The input port of first spatial light router is connected with N root single mode input fibers, each light that will be multiplexed in single mode input fiber
Signal is routed on the first corresponding output port of spatial light router；The output port of first spatial light router is through one
Group wavelength convert and routing module are connected with the input port of second space optical router, and the optical signal of every group of different wave length is passed through
Wavelength convert processing is crossed to be transmitted in the corresponding input port of second space optical router；Second space optical router will be by
It is each right that the optical signal of one group of wavelength convert and every group of different wave length of routing module output is transmitted to second space optical router
The output port answered；Second space optical router connects single-mode output optical fiber through another group of wavelength convert and routing module, passes through
Another group of wavelength convert and routing module handle the optical signal of each road output port of second space optical router through wavelength convert
It reloads on the arbitrary channel in the road output port；First spatial light router and second space optical router mirror image work
Make so that each wavelength of optical signal and the first spatial light router in the every road optical fiber exported by second space optical router are each
Each wavelength of optical signal in self-corresponding input optical fibre is consistent.
The wavelength convert and routing module include sequentially connected optical demultiplexer, N number of first wave length converter, the
Three spatial light routers, N number of second wave length converter and optical multiplexer；Light letter of the first spatial light router per road output port
Number first passing through optical demultiplexer is decomposed into Single wavelength signal, and each Single wavelength signal is transferred to through respective first wave length converter
In 3rd spatial light router, the 3rd spatial light router is converted after carrying out space routing to Single wavelength signal through second wave length again
Optical multiplexer is transmitted to after device wavelength convert, each Single wavelength signal is merged into optical signal all the way and is output to second by optical multiplexer
Spatial light router.
The first wave length converter or second wave length converter include the light filtering that optical signal before converting filters out
Device structure.
Do not include optical filter structure, the 3rd space optical path in the first wave length converter and second wave length converter
There is different channel spacings by device and the first spatial light router, second space optical router so that single mode input fiber and
The transmission spectrum of the wavelength of the optical signal transmitted in single-mode output optical fiber and the 3rd spatial light router mismatches.
The optical demultiplexer is 1 × N optical demultiplexers, using array waveguide grating or diffraction etched diffraction grating.
The optical multiplexer is the optical multiplexer of N × 1, using array waveguide grating, diffraction etched diffraction grating or multiple-mode interfence
Coupler.
The first spatial light router or second space optical router are circular array waveguide optical grating or Xun Huan diffraction
Etched diffraction grating.
The 3rd spatial light router is circular array waveguide optical grating or Xun Huan diffraction etched diffraction grating.
The first wave length converter or second wave length converter are the nonlinear effect using semiconductor optical amplifier
The optical signal of one wavelength is loaded into the Wavelength transformational structure on the DC laser of another different wave length.
First spatial light router, second space optical router and the wavelength convert and routing module are all or part of
It integrates on the same chip.
The beneficial effects of the invention are as follows：
The present invention is based on wavelength convert and routing modules, there is fabulous expansion, reduce the design difficulty of All-optical routing,
There is the effect of space routing and wavelength convert simultaneously, it can be achieved that input terminal has N altogether2A channel routes to arbitrary output port
Arbitrary channel.
Clear logic of the present invention can completely realize signal wavelength conversion, the function of forwarding in All-optical routing, and to light
Signal format is fully transparent.
The present invention enjoys the bandwidth of bigger compared to traditional optical-electrical-optical router and existing optical routing structure, can complete higher
The light data processing of bit rate exchanges.
Description of the drawings
Fig. 1 is the structure diagram of the present invention.
Fig. 2 is the structure diagram of wavelength convert and routing module of the present invention.
Fig. 3 is the first spatial light router routed path schematic diagram of the invention.
Fig. 4 is second space optical router routed path schematic diagram of the present invention.
Fig. 5 is the 3rd spatial light router routing table schematic diagram of the invention.
Fig. 6 is All-optical routing working method example of the present invention.
Fig. 7 is the optical demultiplexer schematic diagram of embodiment.
Fig. 8 is the optical multiplexer schematic diagram of embodiment.
Fig. 9 is the first wavelength shifter structure chart of embodiment.
Figure 10 is second of wavelength shifter structure chart of embodiment.
Figure 11 is the wavelength shifter principle of signal conversion and design sketch of embodiment.
Figure 12 is the spatial light router schematic diagram of embodiment.
Figure 13 is the first input port transmitted spectrum schematic diagram of the 3rd spatial light router of embodiment.
In figure：A, wavelength convert and routing module, the 3, first spatial light router, 4, optical demultiplexer, 5, first wave length
Converter, the 6, the 3rd spatial light router, 7, second wave length converter, 8, optical multiplexer, 9, second space optical router, L1,
L2 ... LN is the sequence number of single mode input fiber, L1 ', L2 ' ... LN ' is the sequence number of single-mode output optical fiber, 10, tunable laser
Device, 11, nonlinear optical amplifier, 12, delay waveguide, 13, linear optical amplifier, 14, phase converter.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
As shown in Figure 1, entire router mainly by 3, two groups of wavelength converts of the first spatial light router and routing module A and
Second space optical router 9 is formed；The input port of first spatial light router 3 is connected with N root single mode input fibers, by single mode
The each optical signal being multiplexed in input optical fibre is routed on 3 corresponding output port of the first spatial light router；First is empty
Between the output port of optical router 3 connect through one group of wavelength convert and routing module A and the input port of second space optical router 9
It connects, by the optical signal of every group of different wave length, by wavelength convert processing, to be transmitted to second space optical router 9 corresponding defeated
In inbound port；Second space optical router 9 will be believed by the light of one group of wavelength convert and every group of different wave length of routing module A outputs
Number it is transmitted to 9 corresponding output port of second space optical router；Second space optical router 9 is through another group of wavelength convert
And routing module A connection single-mode output optical fiber, by another group of wavelength convert and routing module A by second space optical router 9
The optical signal of each road output port is handled through wavelength convert and reloaded on the arbitrary channel in the road output port；First is empty
Between optical router 3 and 9 mirror image of second space optical router work so that the every road optical fiber exported by second space optical router 9
In 3 corresponding input optical fibre of each wavelength of optical signal and the first spatial light router in each wavelength of optical signal one
It causes.
Every group of wavelength convert and wavelength convert in routing module A and routing module A quantity with single mode input fiber
Radical is identical.
As shown in Fig. 2, each wavelength convert and routing module A design all sames in system, including sequentially connected photodissociation
Multiplexer 4, N number of first wave length converter 5, the 3rd spatial light router 6, N number of second wave length converter 7 and optical multiplexer 8 are born
Duty carries out wavelength convert and the routing of one group of N number of wavelength channels of spatial light 3 one output ports of router.
As shown in Fig. 2, the first spatial light router 3 first passes through optical demultiplexer 4 per the optical signal of road output port and decomposes
For Single wavelength signal, each Single wavelength signal is transferred to through respective first wave length converter 5 in the 3rd spatial light router 6,
3rd spatial light router 6 transmits after 7 wavelength convert of second wave length converter again after carrying out space routing to Single wavelength signal
To optical multiplexer 8, each Single wavelength signal is merged into optical signal all the way and is output to second space optical router 9 by optical multiplexer 8.
Preferably, first wave length converter 5 or second wave length converter 7 include optical filter structure, and first wave length turns
The optical filter structure of parallel operation 5 or second wave length converter 7 filters out optical signal before conversion.
Preferably, in the case of not including optical filter in first wave length converter 5 and second wave length converter 7, the
The output port of one wavelength shifter 5 and second wave length converter 7 can exist simultaneously optical signal after former optical signal and conversion.If
3rd spatial light router 6 designs identical with the first spatial light router 3, second space optical router 9, then former optical signal can road
By a certain output port to 3, interference routes to optical signal after the conversion that the port exports.After avoiding former optical signal to conversion
Optical signal crosstalk in each port, the 3rd spatial light router 6 and first in optical signal crosstalk, i.e. the 3rd spatial light router 6
Spatial light router 3, second space optical router 9 have different channel spacings so that single mode input fiber and single-mode output
The transmission spectrum (i.e. transmitted spectrum) of the wavelength of the optical signal transmitted in optical fiber and the 3rd spatial light router 6 mismatches.
When it is implemented, for wavelength convert and routing module A so that the 3rd spatial light router 6 and the first spatial light
Router 3, the interchannel of second space optical router 9 are separated with certain deviation, prevent former optical signal from by the 3rd space optical path
By device 6.Former optical signal enters first wave length converter 5, makes signal loading to one group of new wavelength, with the 3rd spatial light router
6 channel matcheds complete channel switch that is, in wavelength convert and routing module A using one group of different wave length.In wavelength convert mould
In block A, by first time wavelength shifter 5, the optical signal after optical demultiplexer 4 demultiplexes is made to be transferred to one group of different wave length
On the light at interval, by the 3rd spatial light router 6, using second of wavelength shifter 7, by the 3rd spatial light router 6
Optical signal after the routing of space is converted again to the wavelength for meeting 9 channel spacing of second space optical router, continues to transmit.
Optical demultiplexer 4 is 1 × N optical demultiplexers, is according to designed by the wavelength interval of N number of channel in input optical fibre
Single ended input, the optical passive component of N number of port Single wavelength output, preferably using array waveguide grating AWG or diffraction etching light
Grid EDG.
Optical multiplexer 8 is the optical multiplexer of N × 1, for N number of input single-wavelength light signal merge into the light of single port output without
Source device preferably uses array waveguide grating AWG, diffraction etched diffraction grating EDG or multi-mode interference coupler MMI.
Preferred first spatial light router 3,9 and the 3rd spatial light router 6 of second space optical router can it is identical or
Person differs, and circular array waveguide optical grating AWGR or Xun Huan diffraction etched diffraction grating EDGR can be used.
The first wave length converter 5 or the structure of second wave length converter 7 can be identical or differ, and are specially profit
With the nonlinear effect of semiconductor optical amplifier SOA by the optical signal loading of a wavelength another different wave length DC laser
On Wavelength transformational structure.
Preferably, structure as shown in Figure 9 can be used in first wave length converter 5 or second wave length converter 7, including adjustable
Humorous laser 10, nonlinear optical amplifier 11 and delay waveguide 12, detection light and the flashlight warp that tunable laser 10 is sent
11 input terminal of waveguide connected nonlinearity image intensifer, the output terminal of nonlinear optical amplifier 11 connect fiber waveguide and delay ripple respectively
Signal is exported after leading 12.
Preferably, structure as shown in Figure 10 can be used in first wave length converter 5 or second wave length converter 7, including can
Tuned laser 10, nonlinear optical amplifier 11, delay waveguide 12, linear optical amplifier 13 and phase converter 14, flashlight is divided into
Two-way connects respective 13 input terminal of linear optical amplifier, tunable laser 10 after fiber waveguide and delay waveguide 12 respectively
Send two-way detection light, the output terminal of two 13 output terminals of linear optical amplifier and corresponding tunable laser 10 is through coupling
Clutch couples, by the signal of two 13 output terminals of linear optical amplifier and the two-way of tunable laser 10 detection light difference coupling
It closes, respective 11 input terminal of nonlinear optical amplifier is connected to after forming two ways of optical signals, two-way nonlinear optical amplifier 11
Output after one of 11 output terminal of nonlinear optical amplifier connection phase converter 14 with the nonlinear optical amplifier 11 of another way
Final optical signal is exported after the coupling of end.
Above-mentioned tunable laser is tunable semiconductor laser, and nonlinear optical amplifier 11 uses nonlinear optical
Amplifier, linear optical amplifier 13 use linear semiconductor image intensifer.
The N of the present invention is positive integer, when needed, need to only increase and output and input number of fibers, and corresponding increase by three
3,6,9 port number of spatial light router and the number of wavelength convert and routing module A, wherein wavelength convert and routing module A
Structure and design all same.
The operation principle of the present invention is as follows：
In the present invention, each signal wavelength subscript occurred in figure is the same, and it is the same to represent wavelength.It is transmitted in input optical fibre
One group of wavelength of optical signal matrix such as formula 1.Wherein subscript first digit i represents optical fiber sequence number, and second digit j represents channel sequence
Number, such as λ12Represent second channel wavelength of first input optical fibre.
Wherein, the first spatial light router 3 designs identical with second space optical router 9, mirror image use, be have it is identical
Free Spectral Range Δ λFSR, same channel interval delta v AWGR or EDGR passive devices, with every optical fiber input signal wavelength
Scope and wavelength interval match.First spatial light router, 3 routed path such as Fig. 3.After routing, output port wavelength square
Battle array such as formula 2, wherein representing the wavelength of the corresponding output port of spatial light router one per a line：
Second space optical router 9 routed path such as Fig. 4, after wavelength convert module, the wavelength of each port input
Matrix such as 2 output port wavelength matrix such as formula 3 of formula：
In wavelength convert and routing module A, the first wave length converter 5 based on tunable laser, SOA and MZI and
Two wavelength shifters 7 can realize the very broadband wavelength convert of covering, input optical signal can be loaded in tunable laser
In the arbitrary wavelength light that device can export.To avoid crosstalk between optical signal and original signal after wavelength convert, the 3rd spatial light is designed
Router 6 makes it have different operation wavelengths, former optical signal from the first spatial light router 3, second space optical router 9
By just having very big attenuation after the 3rd spatial light router 6.By first time wavelength convert, make former optical signal loading with 3
Matched one group of new wavelength X1,λ2,λ3,…λNOn.3rd spatial light router, 6 routing table such as Fig. 5.By the 3rd spatial light
The forwarding of router 6, optical signal enters second of wavelength convert in corresponding ports after conversion, and transformed wavelength should meet at this time
The needs of second space optical router 9, similarly, the optical signal before conversion is by also there is very big damage after second space optical router 9
Consumption, avoids the crosstalk between channel.
Below by taking the exchange of several representative channels as an example, specific routing procedure is introduced：
(1) in different optical fiber, same logical channel exchanges
Same logical channel refers in different optical fiber, after the forwarding of the first spatial light router 3, into the first spatial light
Matrix is all one group of same logical channel per a line in the wavelength of the same output port of router 3, i.e. formula 2.With λ11And λ22
Exemplified by exchange, such as Fig. 6, first in the first spatial light router 3, by λ11And λ22Respectively is forwarded to from input optical fibre L1, L2
One output port.It is demultiplexed by optical demultiplexer 4, the two is respectively enterd in wavelength convert and routing module A first logical
Road and second channel.λ11Through first time wavelength convert to λ2, forwarded by the 3rd spatial light router 6, into second of wavelength
Second channel, then wavelength convert are converted to λ22.Similarly, λ22Through first time wavelength convert to λ2, by the 3rd spatial light router 6
Forwarding, λ2Into second of wavelength convert first passage, then wavelength convert is to λ11。λ11With λ22After the multiplexing of multiplexer 8, enter
Second space optical router 9 is forwarded to first, second output port respectively.Then complete λ in input optical fibre L111And input optical fibre
λ in L222Port and the complete exchange of wavelength.
Because the output port of each the first spatial light router 3 includes the correspondence phase from each input optical fibre
Same logic channel, therefore, any channel in input optical fibre can be with corresponding same logical channel in an other optical fiber
The complete exchange of completing port and wavelength.
Next, in second group of wavelength convert and routing module, λ11And λ22It can be respectively converted again to output optical fibre
Any one of L1 ' and L2 ' channel.For example, λ11It converts to the 3rd channel lambda of output optical fibre L1 '13, then according to the 3rd space
The routing table of optical router 6, such as Fig. 5, λ11In second group of wavelength convert and routing module, through first time wavelength convert, conversion
To λ3, by routing, then through second of wavelength convert, convert to λ13, into output optical fibre L1 '.So far, any input is completed
Any channel in optical fiber routes to the overall process of any channel of certain output optical fibre.
(2) in different optical fiber, Different Logic channel switch
With the λ in input optical fibre L112With the λ in input optical fibre L222Exemplified by exchange, such as Fig. 6.First in first time space
In optical routing module 3, λ12It is forwarded to second output terminal mouth, λ22It is forwarded to the first output port.The two passes through demultiplexing respectively,
In wavelength convert and routing module, λ22Into second channel, through first time wavelength convert to λ2, by the 3rd space optical path by
Device 6 forwards, λ2Into second of wavelength convert first passage, then wavelength convert is to λ11, after the multiplexing of multiplexer 8, into second
Spatial light router 9.Similarly, λ12Into wavelength convert modules A, through first time wavelength convert, by its contained signal loading in λ4,
The third channel of second of wavelength convert is routed to, then by signal loading in λ23。λ11And λ23By second space optical router 9
Forwarding respectively enters the first output port and second output terminal mouth.
Unlike the channel switch in the case of the first, in this case, λ in input optical fibre L112Be converted to second
λ in 9 second output terminal mouth of spatial light router23, λ in input optical fibre L222It is defeated to be converted to second space optical router 9 first
λ in exit port11, wavelength is inconsistent before and after routing.
With the first situation, in second group of wavelength convert and routing module, λ23With λ11It can be again converted to output light
Any one channel in fine L2 ' and L1 '.For example, λ23It converts to the second channel λ of output optical fibre L2 '22, complete input light
Fibre arrives the complete exchange of output optical fibre port and wavelength, then the routing table according to the 3rd spatial light router 6, such as Fig. 5, λ23
In two groups of wavelength converts and routing module, through first time wavelength convert, convert to λ4, turn by routing, then through second of wavelength
It changes, converts to λ22, into output optical fibre L2 '.
The present invention is realized except that can build system by optical fiber connection with various functions module, can also pass through active nothing
Source integrated technology is realized on chip, including the multiple extension based on III-V wafers or quantum well mixing technique monolithic collection
Into, III-V hybrid integrated is accurately bonded with SOI.
All structures by the invention, such as the first spatial light router 3, second space optical router 9 and wavelength convert
And routing module A can completely or partially be integrated on the same chip.
Wherein, part is integrated can specifically integrate according to device function subregion, such as in wavelength convert and routing module A,
Each wavelength shifter 5 can be integrated into a device, after array, by optical fiber and the 3rd spatial light router 6, multiplexer 8,
The other devices such as demultiplexer 4 connect, and expand to entire wavelength convert and routing module.Wavelength convert and routing module and first
It is equally connected between spatial light router 3 and second space optical router 9 using optical fiber.
The specific implementation process of the present invention：
Optical demultiplexer 4 has one group of wavelength difference using a kind of AWG structures as shown in Figure 7 in demultiplexer input port
Optical signal, by AWG devices, be divided into N roads, from demultiplexer output port export.
Optical multiplexer 8 is using a kind of AWG structures as shown in Figure 8, and N number of port inputs difference respectively at multiplexer inputs mouth
The optical signal of wavelength by AWG, is combined into all the way, is exported from multiplexer output terminal mouth.
Structure as shown in Figure 9, Figure 10 can be used in two groups of selections of wavelength shifter 5,7.Tunable laser 10 can pass through
The modes such as electric current injection or thermal tuning, obtain DC laser.As shown in figure 9, the detection light that is sent of tunable laser 10 and
Flashlight together into nonlinear optical amplifier 11, by Nonlinear and crossing modulated by the two, and detection light will load signal.Due to
The limitation of semiconductor devices carrier lifetime in high speed crossmodulation, detects the signal strength of light, phase changes with flashlight
And the variation occurred has trailing phenomenon.For example quantum well structure semiconductor chip, carrier lifetime are about a few nanosecond ns, it is clear that
10GHz and more than crossmodulation response demand cannot be met.By the waveguide 12 that is delayed, make detection light through above and below different length two
Arm reaches output port with the time difference of Δ t.As shown in Figure 11 A, there are a phase differences for the light of two-way detection at this timeIt is logical
Cross optimization phase differenceFormer detection light " hangover " effect can be eliminated after the detection interference of light of two beams, phase information is converted by force
Information is spent, signal quality is improved, such as Figure 11 B.Structure shown in Figure 10 is then that incoming signal light first is divided into two-way, below a-road-through
Delay waveguide 12 is crossed so that the two retention time difference Δ t, balances two paths of signals luminous power by linear amplifier 13.10 are sent out
The detection light gone out is also divided into 2 tunnels, is coupled as entering nonlinear amplifier 11 afterwards all the way respectively with upper arm, underarm flashlight.Equally,
The crossmodulation of detection light and flashlight occurs in 11, then the phase of light is detected by two-arm above and below 14 optimizing regulation of phase converter
DifferenceSuch as Figure 11, preferable detection optical signal output is obtained.
The signal of the two-arm up and down delay Δ t of the offer of delay waveguide 14 is determined according to signal rate.If input signal is
10Gbit/s zero code, then Δ t is about 0.05ns.If the phase difference of upper and lower two-arm detection optical signal is 180 °, can be complete
It is absolutely dry to relate to delustring, reach maximum extinction ratio.
Three spatial light routers 3,6,9 are as shown in figure 12, are a kind of Xun Huan etched diffraction grating EDGR, can be every by the left side
The Wavelength routing of Single port input is to corresponding output port.With reference to λ in Fig. 611With λ22Exchange process, when the system for 4 it is defeated
Enter optical fiber, there is 4 channels in every input optical fibre, i.e., when 4 × 4, each channel in input optical fibre through the first space optical path by
After device 3 forwards, 4 wavelength of optical signal into the first output port of the first spatial light router 3 are respectively λ11=
1549.64nm λ22=1550.44nm, λ33=1551.24nm, λ44=1552.04nm.λ11Through first time wavelength convert, will believe
Number loading in λ2On=1550.0nm.It is the first input port transmission spectrum example of the 3rd spatial light router 6 such as Figure 13.λ11
With λ2Simultaneously into the first input port of the 3rd spatial light router 6, but due to λ11The 3rd spatial light router 6 is not met
Operating condition, so have the loss of more than 28dB, and λ2Only 2dB losses left and right, greatly reduces former optical signal λ11To follow-up
The influence of routing procedure.Pass through forwarding, λ2It is exported in the second output terminal mouth of the 3rd spatial light router 6.
The routing bandwidth of the present invention is mainly by active device (including semiconductor optical amplifier and tunable laser etc.)
Dynamic response bandwidth limits.In a wdm system, the wavelength handoff response time of Wavelength tunable laser is directly determined with ripple
The optical signal bag transmitted response time of a length of foundation.This routing infrastructure experienced 4 wavelength converts, then the most long sound of typical case of system
It is between seasonable：
ttot=4 × tswitch+tc
Wherein, tcFor a passage routed path processing time, tswitchFor the letter of tunable laser in wavelength shifter
Road switching time.Total response time ttotAlso light data bag queue delay is reflected, and it is it is thus determined that adjacent in a passage
Minimum interval needed between two optical signal data queues.By taking V-type coupled cavity lasers as an example, electrical pumping tuning channel
Switching time about 500ps.Based on current very large scale integration technology (VLSI technology), tcIt can be estimated as
0.5ns.Single-chip integration Wavelength transformational structure based on SOA can complete the wavelength convert of 10Gb/s~40Gb/s.In 40Gb/s
In the case of, the response time t of systemtotSignal congestion will not be caused, i.e., this All-optical routing device is estimated can complete N2×40Gb/s
Data routing.The present invention enjoys the bandwidth of bigger compared to traditional optical-electrical-optical router and existing optical routing structure as a result, can
It completes the light data processing of playout length, exchange.
The afforded maximum routed channels number of the present invention is N2, i.e. N roots input optical fibre, the number of channel in every optical fiber
Mesh≤N.When increasing input optical fibre number, it is only necessary to redesign three spatial light routers 3,6,9, make its port number with
Input optical fibre number is consistent, while channel spacing meets incident optical signal needs.In wavelength convert and routing module A twice
Wavelength convert design need not be changed, and only need linearly increasing number as desired.
In the present invention, AWG devices at 8 liang of optical demultiplexer 4 and optical multiplexer can also use etched diffraction grating EDG or
Multi-mode interference coupler MMI is substituted, and the EDGR devices at three spatial light routers 3,6,9 can also use AWGR devices to substitute.
Above-described embodiment is used for illustrating the present invention rather than limiting the invention.The present invention spirit and
In scope of the claims, to any modifications and changes that the present invention makes, protection scope of the present invention is both fallen within.
Claims (9)
1. a kind of All-optical routing device of modular extendable, it is characterised in that：Including the first spatial light router（3）, two groups of ripples
Long conversion and routing module（A）And second space optical router（9）；First spatial light router（3）Input port and N root lists
Mould input optical fibre connects, and each optical signal being multiplexed in single mode input fiber is routed to the first spatial light router（3）Each
On corresponding output port；First spatial light router（3）Output port through one group of wavelength convert and routing module（A）With
Two spatial light routers（9）Input port connection, by the optical signal of every group of different wave length by wavelength convert processing be transmitted to
Second space optical router（9）In corresponding input port；Second space optical router（9）Will by one group of wavelength convert and
Routing module（A）The optical signal of every group of different wave length of output is transmitted to second space optical router（9）Corresponding output
Port；Second space optical router（9）Through another group of wavelength convert and routing module（A）Single-mode output optical fiber is connected, by another
One group of wavelength convert and routing module（A）By second space optical router（9）The optical signal of each road output port is through wavelength convert
Processing is reloaded on the arbitrary channel in the road output port；First spatial light router（3）With second space optical routing
Device（9）Mirror image works so that by second space optical router（9）Each wavelength of optical signal and first in every road optical fiber of output
Spatial light router（3）Each wavelength of optical signal in corresponding input optical fibre is consistent；
The wavelength convert and routing module（A）Including sequentially connected optical demultiplexer（4）, N number of first wave length converter
（5）, the 3rd spatial light router（6）, N number of second wave length converter（7）And optical multiplexer（8）；First spatial light router（3）
Optical demultiplexer is first passed through per the optical signal of road output port（4）Single wavelength signal is decomposed into, each Single wavelength signal is through respective
First wave length converter（5）It is transferred to the 3rd spatial light router（6）In, the 3rd spatial light router（6）To unicast long letter
Number carry out space routing after again through second wave length converter（7）Optical multiplexer is transmitted to after wavelength convert（8）, optical multiplexer（8）
Each Single wavelength signal is merged into optical signal all the way and is output to second space optical router（9）；
3rd spatial light router（6）With the first spatial light router（3）, second space optical router（9）Interchannel be separated with
Deviation prevents former optical signal from by the 3rd spatial light router（6）, former optical signal enters first wave length converter（5）, make letter
Number be loaded onto one group it is new with the 3rd spatial light router（6）The wavelength of channel matched, i.e., in wavelength convert and routing module（
A）It is middle that channel switch is completed using one group of different wave length；In wavelength convert and routing module（A）In, it is converted by first wave length
Device（5）, make through optical demultiplexer（4）Optical signal after demultiplexing is transferred on the light at one group of different wave length interval, passes through the 3rd
Spatial light router（6）, using second wave length converter（7）, by the 3rd spatial light router（6）Light letter after the routing of space
It number converts again to meeting second space optical router（9）The wavelength of channel spacing continues to transmit.
2. a kind of All-optical routing device of modular extendable according to claim 1, it is characterised in that：The first wave
Long converter（5）Or second wave length converter（7）The optical filter structure filtered out including optical signal before converting.
3. a kind of All-optical routing device of modular extendable according to claim 1, it is characterised in that：The first wave
Long converter（5）And second wave length converter（7）In not include optical filter structure, the 3rd spatial light router（6）With first
Spatial light router（3）, second space optical router（9）With different channel spacings so that single mode input fiber and single mode
The wavelength of the optical signal transmitted in output optical fibre and the 3rd spatial light router（6）Transmission spectrum mismatch.
4. a kind of All-optical routing device of modular extendable according to claim 1, it is characterised in that：The photodissociation is answered
Use device（4）For 1 × N optical demultiplexers, using array waveguide grating or diffraction etched diffraction grating.
5. a kind of All-optical routing device of modular extendable according to claim 1, it is characterised in that：The light multiplexing
Device（8）For the optical multiplexer of N × 1, using array waveguide grating, diffraction etched diffraction grating or multi-mode interference coupler.
6. a kind of All-optical routing device of modular extendable according to claim 1, it is characterised in that：Described first is empty
Between optical router（3）Or second space optical router（9）For circular array waveguide optical grating or Xun Huan diffraction etched diffraction grating.
7. a kind of All-optical routing device of modular extendable according to claim 1, it is characterised in that：Described the 3rd is empty
Between optical router（6）For circular array waveguide optical grating or Xun Huan diffraction etched diffraction grating.
8. a kind of All-optical routing device of modular extendable according to claim 1, it is characterised in that：The first wave
Long converter（5）Or second wave length converter（7）To utilize semiconductor optical amplifier（SOA）Nonlinear effect by a wavelength
Optical signal loads the Wavelength transformational structure on the DC laser of another different wave length.
9. a kind of All-optical routing device of modular extendable according to claim 1, it is characterised in that：Described first is empty
Between optical router（3）, second space optical router（9）With wavelength convert and routing module（A）It is completely or partially integrated in same
On chip.
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